#include <iostream>
using namespace std;
using std::cout;
using std::endl;
namespace wd{
int number=10;
const int daysOfweek=7;
void m1(){
    cout<<"wd::m1"<<endl;

}}

    
int main(int argc, char * argv[]){
using namespace wd;
    m1();
cout<<"hello world"<<endl;    
    return 0;
}

